A 20 hour timelapse of US airspace taken from 2AM to 10PM on November 27th 2013.

The Yellow planes represent aircraft with ADS-B (live global tracking) -
The Orange planes represent aircraft monitored by FAA tracking alone (slower rate of refresh)
The Red planes represent aircraft which have changed their Squawk Code (this can represent the loss of communications, a hijacking, or a general emergency)
Music: "Camping" - Detektivbyrån

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